Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> While messing with EXPLAIN on a query emitted by pg_dump, I noticed that
> current Postgres 10 emits weird bucket/batch/memory values for certain
> hash nodes:
> -> Hash (cost=0.11..0.11 rows=10 width=12) (actual time=0.002..0.002 rows=1 loops=8)
> Buckets: 2139062143 Batches: 2139062143 Memory Usage: 8971876904722400kB
> -> Function Scan on unnest init_1 (cost=0.01..0.11 rows=10 width=12) (actual
time=0.001..0.001rows=1 loops=8)
Looks suspiciously like uninitialized memory ...
> The complete query is:
Reproduces here, though oddly only a couple of the several hash subplans
are doing that.
I'm not planning to dig into it right this second either.
regards, tom lane